Derivative Financial Instruments - Offsetting of Derivative Assets - Offsetting of Derivative and Financial Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Derivatives: Subject to master netting arrangements:
Netting	$ (117,679)	$ (61,534)
Total.
Gross amounts of recognized liabilities	166,766	83,246
Net amounts of liabilities presented in the consolidated balance sheet	49,087	21,712
Mortgage loans sold under agreements to repurchase
Net amounts of liabilities presented in the consolidated balance sheet	5,768,570
Debt Issuance Costs
Net amount of liabilities in the consolidated balance sheet	5,764,157	3,001,283
Total
Net amounts of liabilities presented in the consolidated balance sheet	5,817,657	3,026,402
Net amount of liabilities in the consolidated balance sheet	49,087	21,712
Loan Repo Facility
Mortgage loans sold under agreements to repurchase
Net amounts of liabilities presented in the consolidated balance sheet	5,768,570	3,004,690
Debt Issuance Costs
Debt issuance costs	(4,413)	(3,407)
Net amount of liabilities in the consolidated balance sheet	5,764,157	3,001,283
Forward contracts | Purchases
Total.
Gross amounts of recognized liabilities	17,064	48,670
Forward contracts | Sales
Total.
Gross amounts of recognized liabilities	135,827	20,684
Interest rate lock commitments
Total
Net amounts of liabilities presented in the consolidated balance sheet	3,795	10,884
Net amount of liabilities in the consolidated balance sheet	3,795	10,884
MBS call options
Total.
Gross amounts of recognized liabilities	7,830
Put options on Eurodollar futures | Sales
Total.
Gross amounts of recognized liabilities		$ 3,008
Call options on Eurodollar futures | Sales
Total.
Gross amounts of recognized liabilities	$ 2,250